<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>08-点击停止定时器</title>
</head>

<body>
  <button>点击停止定时器</button>
  <script>
    // clearTimeout('定时器对象');
    var btn = document.querySelector('button');
    var timer = setTimeout(function () {
      console.log('爆炸了');
    }, 5000);

    btn.addEventListener('click', function () {
      clearTimeout(timer);
      console.log('定时器停止成功');
    })
  </script>
</body>

</html>